code_saturne User's Forum

Hello Kenneth,

Going to your first post, you have mention that you can not visualise the temperature contours in every second in ParaView. Checking the listing file and the xml you have set the postprocessing output "at the end of calculation", wherewith you will have only one output....at the end ...

Hello Sagar,

I tested with both, CS 4.0 and 4.2. I attach the corresponding RESU directories with the listing files and solutions.

I can not figure what can be the problem..In the listing files the group "8" now it is a boundary face.

Regards,

Luciano

Hello Andrea,

Nice video!

Do you update the head loss factor in each iteration? Or you lead to the fluid flow to adapt to the new head loss factor distribution.

Regards,

Luciano

Hello Andrea,

Are you following th advice of Yvan ("...you may want to increase the value progressively")? This will allow that the fluid flow adapt to the new viscosity distribution, avoiding strong jumps in the velocity.

Is your penalization function continuos in terms of "k"? This will give you ...

Muhsin,

In sections 5.2 and 5.4.4 of the theory guide of CS ( http://code-saturne.org/cms/sites/default/files/docs/4.0/theory.pdf ) you can find a more detailed answer to this question.

Outlet BC " Warning: if the outgoing mass-flux is negative, i.e. if the outlet becomes an inlet, then the mass ...

Hello Mushin,

I don't understand your question..but in your listing file you have a negative mass flow at inlet and a positive mass flow at outlet. The sign of the mass flow at boundaries depends on the sign of \vec{V} \cdot \vec{n} .

When you activate the gravity, Are you also impousing a ...

Hello Mushin,

I was looking at your listing file. At start of your simulation you have an important density difference (481.81 MIN, 589.92 MAX) so, this could lead an important bouyancy (body) force. Did you try to reduce the value of the imposed gravity in order to reduce this forces? Because, as ...

Hello Mushin,

Could you solve your problem? If not, could you upload a small problem where the case fails.

Regards,

Luciano

Hello Sagar,

I uploaded an user function and a case file where your problem it is working (I attach a figure).

I used the default values in the user fuction like in the /REFERENCE/cs_user_mesh.c using as selection criteria "8" and the same selection criteria in the GUI to impose the wall BC ...

Hello,

I didn't find anything strange in the listing. I attach a case file and a mesh which I get the solutions like in the tutorial.

Try to compare this case file with your case file in order to find the difference,
Regards,

Luciano